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From rosin purified abietic acid was prepared by using abietic acid as stared material acylamino surfactant was synthesized by maleric anhydride and diethanolamine.

纯化得到的酸(枞酸)与马酸酐反应得马酸,再与胺反应制得酰胺基表面活情剂.

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helibus, helic-, helicab, helical, helically, helically-wound, helicar, heliced, helicene, helices,

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3G, 401(K), a,

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